Pantograph engraving machine



W. ,H. HOPE.

PANTOGRAPH ENGRAVING MACHINE. APPLICATION, FILED JUNE 25,1919.

Patented Mar. 14, 1922; 2 SHEETs-SHEET l- FIELI.

INVENTUR.

W. H. HOPE.

PANTOGRAPH ENGRAVINQ MACHINE. APPLICATION FILED JUNE 25. WW.

1,409,718. Patented Mar. 14,1922.

2 SHEETS-SHEET 2- Fl E. 5

.lNvENTEIR.

ATTORNEY.

PATENT OFFICE.

WILLIAM H. HOPE, 0F PROVIDENCE, RHODE ISLAND.

ran'roeaarn nnenavme MACHINE.

Application filed June 25, 1919.

To all whom it may concern.

Be it known that I, lVILLIAM H. Horn, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented a new and useful Improvement 'in Pantograph Engraving Machines, of which the following is specification.

This invention relates to certain new and useful improvements in a pantograph engraving machine, and it has for its primary object to provide a machine to reproduce on the engraving rolls patterns from a design plate in alternate enlarged and reduced of feet so as to impart to the pattern on the rolla long, drawnout, gradually diminishing and gradually enlarging structure of the design. I I

The invention consists in thefeatures of construction and the arrangements and combinations of parts hereinafter described and claimed, reference being had to the accompanying drawings wherein- Figure 1 1s a hack elevation of a pantograph embodying the improved construction.

Figure 2 is an end elevation thereof with portions omitted.

Figures 3 and 4 show sample patterns produced on rolls, and I Figures 5 and 6 are detailed views of the machine. 1

Referring more in detail to the drawings, the numeral 1 designates the frame having journal bearings forthe roll 2 and an underlying support for the design plate 3 over which a stylus 4 is adapted to be manipulated. The stylus is carried on the free end of an arm 5 that has pivotal connection with a wheeled carriage 6 which operates in track grooves in the upper face of an underlying supporting carriage '7 mounted to traverse on the rails 8.

In the upper surface of carriage 6 is formed a track groove parallel with rails 8 to receive and guide the two-wheeled truck 9.

. An arm 10 pivotally connects the truck to a bracket 11 which extends outwardly and downwardly from the diamond bar carriage 12, said carriage being supported on wheels 13 that are guided in track grooves 14 formed in shelf 15 of the machine frame. Fixedly supported on carriage 12 is a rack bar 16 which meshes with a pinion 17 that is Specification of Letters Patent.

Patented Mar. 14, 1922.

SerialNo. 306,569.

carried on one end of a shaft 18, and this shaft is journaled in a frame bearing 19.

The diamond cutter 20 is carried over the varnished roll 2 by a lever or arm 21 pivoted on the diamond bar 22 which is supported on wheels 23 operating on inturned opposlng brackets 24 carried by the frame. A rack bar 25 is pivoted at one end of the diamond. bar 22 and has meshing therewith a pinion 26 which is eccentrically mounted on the opposite. end of the shaft 18. This eccentric mounting of pinion 26 will oscillate the rack bar25 about its pivotal mounting as it pushes and pulls thereon, the shifting of the diamond bar being gradually and alternately increased and decreased on rotation of the shaft.

This irregular movement of the diamond bar longitudinally of the varnished roll 2 is supplemented byan irregular rotary movement of said roll, the same being accomplished by the following construction. One of the roll journals is extended and pro vlded with a disk 27 diametrically across which is fixed an arm 28 having-a1 lengthwise groove 29 in its outer face. A lateral bracket arm 30 on carriage 7 carries an upstanding arm 31 grooved longitudinally in its face opposing groove 29. Adjustably sccured within groove 29 as by set screw .32, is a shoe 33. designed to slidably engage in the groove 34: of arm 31 whereby the re ciprocatory motion of the carriage 7 will be converted into oscillatory motion for the roll of an irregular and gradually increasing or decreasing speed depending upon movement of arm 28 toward or from the perpendicular.

From the foregoing it will be observed that movement of the stylus in a horizontal or sidewise direction will cause irregular movement of the diamond bar and cutter, vertical or in and out movement of the stylus will effect irregular rotation of the roll, while stylus movement along diagonal and curved lines will effect both irregular movement of the diamond bar and of the roll. Fig. 3 exemplifies the resultant cutting through the varnish of the roll from a pattern on the design plate consisting of a square or square set at an angle, and Fig. a shows the effect produced from following curved lines in straight pattern on the design plate.

The improvements may be and preferably are in the form of attachments for the universal pantograph machine whereby the latter may economically be equipped therewith. I

Having thus described myinvention, what I claim as new and desire to secure by Letters Patent is 1'; A pantograph machine comprising a frame having roll bearings and an underlying support for a design plate, a disk adapted to be secured to the roll journaled in said bearings, a diametrically arranged arm on the disk, a wheeled carriage movably supported on the frame, an upstanding arm carried by the carriage, each arm having a groove in the outer opposing face, a shoe adjustable in the groove ofone" arm and extending into the groove Ofllhfi coa'cting arm whereby movement of the carriage will'etfiect' oscillation of the'roll arm, roll cutting means opera'tiy'ely connected to the carriage, and a stylus connected to the carriage;

2. pantograph machine comprising a frame having roll bearings and an underlying support for a design plate, a disk adapted' to be secured to the roll journal'ed said bearings, a diametrically arranged arm on the disk, a wheeled carriage inovably supported on the frame, an upstanding arm carried by the carriage, each arm having a groove in; the outer opposing face, a shoe adjustable in the groove of one arm and extending intothe groove of the coacting' arm whereby movement of the carriage will effect oscillation of the roll arm, a cutter for operatingonthe roll, a stylusconn'ected to the carriage, and means operable by the stylus for imparting irregular bodily movement to the cutter.

8. In a pantograph, arch support, means for imparting rotary movement to the roll support at a gradually increasing and decreasing speed, a cutter disposed for cooperation with the roll support, and means supporting the cutter for movement at a gradually increasing and decreasing speed.

In a pantograph, a-roll support, means for imparting rotary movement to the roll support at a gradually increasing and decreasing speed, and a stylus connected to the means for operating'same.

5. In a pantograph, a roll support, means for imparting rotary movements to the roll support at a gradually increasing and decreasing speed, a cutter, means supporting the cutter and adapted to shift the same lengthwise of a supported roll at a gradually increasing and decreasing speed, and a stylus common to both means for operating the same. r

6; In apantograph, a Cutter, 2: diamond bar supporting the same, and means for shifting the bar including a rack bar pivoted on the diamond bar, and an eccentric pinion meshing with the rack bar to translate constant' rotary movements of the pinion into motions of the diamond bar at variable speeds,

' 7. In a pantograph, acutter, a diamond bar supporting the same, and means for shifting the bar including a rack bar pivoted on the diamond bar, and a stylus, a carriage operable by the stylus andsnpporting a stationary rack bar and a shaft supporting a concentric pinion at onev end for meshing with the stationary rack bar and an eccentric pinion on the opposite end for meshing with the pivoted rack bar. 7

8. In a pantograph, a; cutter, a diamond bar supporting the same, and means for shifting the bar including a rack bar pivoted on the diamond bar, and an eccentri'cally rotatable' pirion meshing with the rack bar, a stylus, means operable by the stylus for rotating tln pinion, means for supporting a roll, and means operable by the stylus for imparting rotary movement to the roll.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM H. HOPE.

Witnesses:

ADA E. HAGERTY, J. A. MILLIR. 

